//	if (document.images) {
//		var logo_normal = new Image();
//		logo_normal.src = '/common/logo.gif';
//		var logo_special  = new Image();
//		logo_special.src  = '/common/logo_newyear.gif';
//		logo_special.width  = '408';
//	}
//	var day=new Date();
//	var year=day.getFullYear();
//	if(year=="2007"){
//		document.images["logo_img"].src = logo_normal.src;
//	}else if(year=="2008"){
//		document.images["logo_img"].src = logo_special.src;
//		document.images["logo_img"].width = logo_special.width;
//	}

document.write("<div id=\"fontsize\">");
document.write("<div id=\"fontsize_title\">文字サイズの変更</div>");
document.write("<ul id=\"fontsize_list\"><li class=\"font-icon\"><a href=\"#\" onclick=\"setFontSize('f_s');return false;\"><img src=\"/common/fs_small_off.gif\" alt=\"小\" width=\"20\" height=\"20\" name=\"s_img\"></a></li><li class=\"font-icon\"><a href=\"#\" onclick=\"setFontSize('default');return false;\"><img src=\"/common/fs_medium_on.gif\" alt=\"中\" width=\"20\" height=\"20\" name=\"m_img\"></a></li><li class=\"font-icon\"><a href=\"#\" onclick=\"setFontSize('f_l');return false;\"><img src=\"/common/fs_large_off.gif\" alt=\"大\" width=\"20\" height=\"20\" name=\"l_img\"></a></li></ul>");
document.write("</div>");

if (document.images) {
	var s_off = new Image(); s_off.src = '/common/fs_small_off.gif';
	var s_on  = new Image(); s_on.src  = '/common/fs_small_on.gif';
	var m_off = new Image(); m_off.src = '/common/fs_medium_off.gif';
	var m_on  = new Image(); m_on.src  = '/common/fs_medium_on.gif';
	var l_off = new Image(); l_off.src = '/common/fs_large_off.gif';
	var l_on  = new Image(); l_on.src  = '/common/fs_large_on.gif';
}


function setFontSize(f_type) {
	if(f_type == "f_s"){
		document.images["s_img"].src = s_on.src;
		document.images["m_img"].src = m_off.src;
		document.images["l_img"].src = l_off.src;
	}else if(f_type == "f_l"){
		document.images["s_img"].src = s_off.src;
		document.images["m_img"].src = m_off.src;
		document.images["l_img"].src = l_on.src;
	}else{
		// f_type == "default"
		document.images["s_img"].src = s_off.src;
		document.images["m_img"].src = m_on.src;
		document.images["l_img"].src = l_off.src;
	}
	setActiveStyleSheet(f_type);
}


function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title)
        a.disabled = false;
    }
  }
  createCookie("style", title, 365);
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled)
      return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
  setFontSize(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}
var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);